You seldom see online web apps as beautiful and fun as Seaquence, created by Ryan Alexander, Gabriel Dunne, and Daniel Massey.

Think of it as a virtual Petri dish, into which you can drop creatures which you design. Each little antennae or wiggle you add to their bodies creates a different sound. Once you drop enough of them into the petri dish, you get an entire musical ecosystem playing an ambient soundtrack of your own invention:

It all sounds quite complicated, but that melts away when you’re playing with it, because the interface is lovely and the programming is flawless. And, at the end, you can send a link to your friends, so that they can hear and watch your masterpiece. Check it now!